CChessStats

2025 Alekhine Open Chess Tournament (A)

Open SwissStandard

22 players participated in this 5-round tournament, held from 06 Sept 2025 to 07 Sept 2025 in Pretoria, South Africa. 2 federations represented. Top 10 Elo average was 1848, and top seed was Calvin Nicholas Jacobs (🇿🇦 RSA, 2081).

Calvin Nicholas Jacobs (🇿🇦 RSA, 2081) won with 5.0/5, ahead of Divine Songo (4.0) and Abinavah Sathish (3.5). Jacobs won solo starting round 4.

The biggest upset came in round 1: Zander Nicolaas Slabbert (1594) beat Juan-Louis Combrink (1845), a +251-point gap.

Location
🇿🇦Pretoria, South Africa
Dates
06 Sept 2025 → 07 Sept 2025
Time control
Standard: 60 minutes with 30 seconds increment from move 1
System
Swiss · 5 rounds
Top seed
🇿🇦Calvin Nicholas Jacobs2081
Avg top 10
1,848
Participants
22
Federations · 2 represented
🇿🇦South Africa×21
🇿🇲Zambia×1
Top 3

How it unfolded

Top 6 · 5 rounds

Calvin Nicholas Jacobs led from R4; +1.0-point edge over the runner-up.

Co-leaders
8
4
2
1
1
1.52.545R1R2R3R4R5
Jacobs5Songo4Sathish3.5Sarakusebwa3Koning3Sidumo3
R4–R5 · LEAD HELD

Calvin Nicholas Jacobs never relinquished the lead after R4; final gap +1.0 over the runner-up.

R2 · HEAD-TO-HEAD · WINNER VS 2ND

Calvin Nicholas Jacobs beat Divine Songo (White).

WIN STREAKS · 3 top finishers

Calvin Nicholas Jacobs 5 wins (R1–R5)Divine Songo 3 wins (R3–R5)Abinavah Sathish 3 wins (R1–R3)

Key matchups · top 4

Head-to-head between the four finishers
Player1234
1Calvin Nicholas Jacobs*
1
1
—
2Divine Songo
0
*——
3Abinavah Sathish
0
—*—
4Shepard Sarakusebwa———*

Grille américaine

#PlayerEloFedR1R2R3R4R5PtsBu C1BuSBPerfΔ
1Jacobs, Calvin Nicholas2081RSA+15N+2B+12N+3B+6N5.012.514.514.502616+28.8
2Songo, Divine1833RSA+18B−1N+13B+5N+7B4.013.014.09.002012+47.2
3Sathish, Abinavah1884RSA+5B+7N+4B−1N=14N3.514.016.010.001935+14.8
4Kgatla, Daniel1634RSA+11N+10B−3N−9B+12N3.012.514.58.001889+66.8
5Yoko, Christopher1722RSA−3N+21B+10N−2B+16N3.012.513.56.001846+15.6
6Sidumo, Anga1803RSA=8N=19B+16N+12B−1B3.012.013.06.001881+19.6
7Vorster, Stephanus1774RSA+21N−3B+19N+8B−2N3.011.512.55.001808+6.0
8Koning, Lehan1636RSA=6B+17N+20B−7N=9N3.010.511.55.501847+60.4
9Chimbala, Junior1782RSA=17B=13N=14B+4N=8B3.010.011.57.251700-12.6
10Sarakusebwa, Shepard1868RSA+14B−4N−5B+17N+13B3.010.011.55.501722-17.0
11Nxumalo, Banele1696RSA−4B=18N=17B+20N+22B3.06.56.52.251766+9.4
12Bulelani, Stephen1843RSA+22N+16B−1B−6N−4B2.013.013.02.001715-34.8
13Brits, Etienne1599RSA=19N=9B−2N+15B−10N2.012.013.04.001725+34.0
14Gondwe Prosper1686ZAM−10N+15B=9NF=3B2.011.512.55.251824+29.6
15Nkwe, Tshiamo1742RSA−1B−14N+18B−13N+20B2.010.011.02.001712-12.4
16Slabbert, Zander Nicolaas1594RSA+20B−12N−6B+18N−5B2.09.010.02.001709+0.4
17Van Meersbergen, Ettienne1623RSA=9N−8B=11N−10B=18N1.512.013.03.501579-13.2
18Modisaotsile, Botlhale1650RSA−2N=11B−15N−16B=17B1.011.012.52.251476-22.0
19Ndwambi, Talifhani1762RSA=13B=6N−7BFF1.010.010.02.501592-13.2
20Combrink, Juan-Louis1845RSA−16N+22B−8N−11B−15N1.010.010.00.001447-109.6
21Lodi, Khotso1602RSA−7B−5N+22NFF1.06.06.00.001599-0.2
22Thorulsley, Kairaav1634RSA−12B−20N−21BF−11N0.07.07.00.00954-63.6

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets